Automatic cut-off for gas lines



T TOLLA AND E. W. BOOTS.

AUTOMATIC cuToFF FOR GAS LINES.Y

APPLICATION FILED IULY II, 1921.

Patented Mar. 28, l1922.

rHRonoRE 'roLLA AND EDGAR WARREN Boo'r's, or nLLwoon 'CiTnamNivsYLvamji Apiniatign mea my 11 To all whom t may concern:

Be 1t known, that we, THnoDonE TOLLA, a citizen of Serbia, and EDGAR 7. Boors,

`citizcngof the `United States,wresiding at Ellwood City, infthe county of Lawrence and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Gut-Offs for Gas Lines; and Ido declare the following to be a full, clear, and l ,exact description of the invention such as ,l will enable others skilled in the art towhich it appertains to makey and use the same.

,y Thisinvention relates to an improved ldevice which can be conveniently termed a cutoff, the same ,being :especially designed for installation in i a lgas line and being such i y that it automatically prevents'further flow ofgas tothe burnerswhen the pressure in i ythe suppl pipe falls belowa pre-determined point` I ence7 leakage of unburnued` gas'into the room Visentirely overcomeand in this way the life ofthe occupants of the building is protected and rendered perfectly safe.

Another aim ofthe invention isto generally improvegupon devices of this class by the provisionof one of extreme simplicityand durability whichis absolutely faultless in operation, can beeasily and y"conveniently installedin the supply line, and ijs composed of comparatively few readily disconnectable A lparts-which enable repairs to be made whenever-necessary or desired. i 1

Other ob'ects 4andadvantagesiof the in` vention will be apparent during the course of the yfollowing description. i y

In the accompanying drawings forming a part of this specification :and in which like numerals are employed `tojdesignate like parts throughout'the same: i A 40 Figureal is a central vertical sectional view, with parts 1n elevation of an automatic `gas cut-oif constructed in accordance with i this :Invention: showing the check valve still' closed and the retaining device in ineffective f position. at theouter endyof the inclined full-Way. j

A F'gure 2 is a viewsimilar to Figi7 showing the auxiliary'..passage` closed and the ymain passage open,' together withthe check `valve/swung to open position.y l

i :In carrying outwthe invention, 'we employ 1' a `body which is designated generally by the numeral '1, thelsame including vertically dis posed paralleliindependent passages 2 and 3,A t, the` first namedof which constitutes the main rpassageand `the remaining one of which Specification of Letters Patent.

`Aurroixm'ric curr-ors FOR GAS Lines.

forms an auxiliary passage. In addition f there is athird and upwardly 'sages whichy is in communication with the yaforesaid passages and constituteswhat may be conveniently termed kak runway. i Communication is `had between the passagesu and i by means of an opening 5' `whereas communicationV between` the `'main Apassage `valve. fIt may bevstated here that this valve is provided with yan upstanding integral lug7 whichconstitutes a stop and serves a purpose to be later described. Itis desirable to devisemeans for normally retaining the valve closed :so, asto prevent passage .of gasint'o the roomv even if the valve con# ,trolling the burner Lor light iis turned on. -`The means preferred foraceomplishing this is 1n the form of aroller 8 of aisizefto per* and runway ishad byimeans of an opening closed `byy an automatically operable'checlr y Patented Mar. 28, `1792,23, ,1921. serial No. sessel 1 a `inclined pasi mit it tohave free movement in the inclined i runway i4. Owing to its own weight, this element Snormallyjassumes the dottedline' `positionshown in'Fig; l; and! in tl'iisjvay prevents the valve 6frQmbeing vswung to y open position. The aforesaid flug 7` serves `to limit the direction of movement ofthe A the ball or roller in one direction. j lAttention `may be here directed tothe fact `that it is `desired to prevent-unduemovement of this roller when in its normal position.A re=- movablcscrew plug y9 is therefore employed and this plug serves* to close-A the screwthreaded opening-:l0 which is immediately l over the valve' 6; With this arrangement it `will be Vseen byrotating this plug` it will` be 1 'screwed inwardly so that it may be caused jto very lightlylcontaet the valveretainer `8 and prevent'possible opening of the valve. `In thiswayf'and evenith'ough the element ,S

becomes' worn after constant use, any `lost e motion may betaken up `by properly ad]usty ing this plug. This screw plug 9 is not only advantageous in that itfpermits the above result to be obtained, but itserves as a means to permit access to behadto the-interior Tof `the body for removing the retainer orfor cleaning purposes. To also assist in clcanying thedevice, especially the' run-away, the latter is closed at-its outer endl bya removable screw cap ll. It is yet'to be pointed outlthat the runway 4 is formed with an outlet opening 12'and an integral elbow 13 with which lthe pipel/l which leads` to the `burner is shown. J It is to-benoted that the lowerl ,ends ofiV l UU threaded and valved pipes lo and 1.6 are in Y `s'erteil into'tlie'sepassages. .WTe-niayniention here that lthe Valve 17 which;controlen-the assage of the fluid through the pipe l5 may lie constructed in; any suitable ,wayglnit yis 'preferably such that it automatically closes immediately after releasing thehandle. 4On the other hand, the valve 18. issuch lthat it necessarily nlnet-be turned :olf b'y hand. Re e'rring'nowtothe opposite ends ofthe pipes l5, it will be lseer'ithat a coi'nnion` reducer coupling 19 is employed and the supply pipe 20 is conneeted withk this'eouplingf' The-operationv of the. device s'asj follows: Assuming thatbothyalves 1LT andlS are closed; it will be seen that in order to permit 'the valve 6 to be opened', *thel element. SV

must bo moved off ofv this 'valve To ydo this, thehandle of the valve 17 is 'gripped and this v lve is opened, permitting the fluid to'passtlirough the pipe 'l6vand then 'through the auiiliary passage Bland4 through the hole 5 and'against the lelement, 8, forcing thelatter" upwardly `through the inclined runway until* VitY vass-urnes l' position approximating that shown iirFigQl fStill holding the yalvef'l open', lth'ereriainiiigyalye 18 .is

openedfland* at 'p "the handle. of the yalyeV 17 is releasedperrnitting Valve'v toclose 'as'j'soon as' the yalv'e'- 18jis open. VThe f iuid' will: then :4 pass through the ina-inn passage and A`pipes connected` tl'ierewith and will'ilift the Valve 6, after Awhich itwill 'pass through the runway and fronithe,4 latter intotliepipe M; 'The` position ot' parts i at 'this time" is: clem-1y" shawn in Fig.A 2.

Hence it will be seenthat lthe pressure v vserves' notonlyf to4 Vhold the. valve" G VV*open but )also 'toretain the retainer 8 infineffeotiye' lposit-uni. New, Vin case? the pressure should decrease until itreaches a danger-v 'o'us degree such as would be insulli'cient to keep the burner lighted,4 the eleinent 48A will roll downwardly through the :runway and the' yalyeG will at the saine v'tiine.,` owing to 'its 'we1ght'7` a'utoniaticallyfresume aclosed "state, after lwhioh the ball will roll on top of the valve and hold the latter closed.

Even though the, w'fallve' 18 is still open; it will bev practically 'impossible gas toleak out yinto the roon aite'r'tho Qve 6 is'thusclosed'nd in ordei t'o'operinit the i gas to dowfto 'the burner'again,t he operaw tion above desoribed `must be repeated, `1t being, of eourse,-neoessary to closeV .the yelye 18before 'this courseis foii'oned. f

By'Gareul'ly considering fthe desleription in eonnecjtionfwththe drawings, persen l* mil-iat with defices of this class -willjd'f less be' able' 'to-obtain a clear ujide-rstanein0r and detailed description is f'deenie'd unneces- A lposition'.

tained. with the'construetion and arrange-V nient fhereinyshown and deseribed this is takenV as the preferred embodiment of the IinyentiQn. wkHoWeyer, we wish Vit to beunderstood that minor changes coming with-V in the -seope of the subjoined claims inay be resorted to if desired.

We ela-nitfkrv i e Y l. A safety cutfoif yfor gas supply lines comprising a body including a vertically disposed main passage and an auxiliary: passage'having Acommunieation therewith, said body ll`alvso` including an upwardly Y inclined vpassage communicating with yboth passages Vauxiliary passage and-brought against it.

l'2. Ajsaety'cut-oft'- for "gasv supply lines comprising abody including main 'and kauAX- iliary passages, lalso including an upwardly 1 A'inclined L passage Qoinni'unicating 'with :said Y 'irstnanied passages'andtproyiding al runwayQa valine"c losing`l 'communication between the niafln passagean'd' runway a movable ref tainerV 'forti-ie"- yalv 'arranged in `said runfwhe'n fluid is kbrought'against it, and an ad? instable device' arranged. over' said valve for preventing undue 'nioyenent of rthe retainer,

wherebyltlie yalvefoannet be opened until the retaining'deyicevis moved to ineiectiye "3. 'A levice of class"described-coniprisinga body including parallel `yertitally disposed main Jandauxiliary passages and Y alsojincludmg an upwardly inclined passage communicating with the first niu'nedpa-s-l sages' Vand?clon'stituting a, runway, a` gravity closed" check yalve for Closing `communication between the m'ainpas'sage and runway', theA latter being Ai'orined with ascrew-threadplug closing saidhole, and aretaln'er for "said Valvevmovable along .said runway and nglirma-lly disposed between said yalye and fr 11e t j 4f; A deyiceof thee-lass describedconiprising a *body` including a vparallel yertioally disposedmain and auxiliary u'id' 'passages :together withv anupwardly inelinedfportion cornmu'nicatlng` with said passages and'pi'o-y viding a combmedorufnway and' fluid pasv sage; said upwardly Zinclined:,po'rtic'ni. being equipp'led'withy an outlet and being fo'rnie'd' at "a point'i'iiiined-iat'el-y `'ove'rxs'a-id main passage c ,with scewfthieaded' nele; afjpivotlly mounted checkvalve' arranged iny said body and' el'osin-g' einiiinieation between/'said f ed hole direc'ftly oyer'saiid Valye,an`c lascrew a stop,a screw plug threaded into the afore A n said screw-threaded hole, a ball arranged in said runway between said valve and plug and bearing against said stop, and valvecontrolled pipes communicating with said main and auxiliar 1 passages.

5. An automatic cut-off for gas supply lines comprising a body including parallel vertically disposed main and auxiliary passages, said Inain passage being provided at its upper end with aVa-lve seat, said auxiliary passage being formed above said valve seat with a port for passage of the fluid, an upwardly opening valve co-operative with said seat, an upwardly inclined runway associated with said passage and communicatino with said port, said runway being provic ed inward of its upper closedfend with a fluid outlet, and a ball retainernormally resting on said yalve to maintain the latter closed, said retainer being positioned opposite said` port so that whenl fluid is passed through the latter and brought against it, it will be moved upwardly in said runway beyond the outlet and held until the pressure is insufficient to maintain it in this position. y

In testimony whereof we have hereunto set our hands. i

THRoDoRE rroLLA. EDGAR WARREN RooTs. 

